Several days of thunderstorm activity for the Eastern US and flooding threats for the South, as well as multiple storms in the West and Southwest this week, which will also bring a wintry mix to 9 states.
Here’s a summary of the National Weather Service (NWS) forecast through Thursday.
Tuesday’s forecast: Rain for the upper Ohio Valley into the mid-Atlantic, while the southern regions of the Ohio Valley and mid-Atlantic from Missouri to Virginia will see thunderstorm activity, which will also cover the entirety of the South and Southeast, with 6 states at risk of flash flooding.
Wednesday’s forecast: The forecast for the South and Southeast is the same as Tuesday, while thunderstorms will expand farther north into the northern Ohio Valley as well as southern Wisconsin and Michigan.
Thursday’s forecast: Thunderstorms will move up into the upper Midwest, while in the south and southeast the flash flooding threat remains for 5 states.
Repeated thunderstorm activity over the southern US will bring multiple days of potential flash flooding over the South. At least six states were under some type of flash flood advisory, watch, or warning from the National Weather Service (NWS) on Tuesday including portions of Florida, Alabama, Georgia, Tennessee, and the Carolinas, which will continue into Wednesday and Thursday.
Multiple rounds of thunderstorms will affect the West and Southwest this week. On Monday, Southern California sought hail and nine states in the West will see the possibility of mixed precipitation this week including Washington, Oregon, Idaho, Montana, Wyoming, Northern California, Nevada, Utah, and Colorado.
On Tuesday, thunderstorms are forecast for Southern California, southern and eastern Nevada, southeastern Idaho, Utah, Arizona, western Colorado, and western New Mexico.
Thunderstorms will drift east and north on Wednesday, and move farther north into Idaho, Wyoming, Montana, and the Dakotas on Thursday.
A new study shows that Oklahoma has narrowly surpassed Florida for experiencing the most lightning flashes per square kilometer from the years 2016 to 2020. The sooner state at a total of 83.4 lightning strikes per square kilometer, while Florida was slightly behind with 82.8 lightning events, the New York Post reported.
While the East and West will have prevalent thunderstorm activity throughout this week, Oklahoma will be mostly storm-free.